Improvement in bolts for doors



To all whom it may concern.-

tu-ited tant @timidi MSW WILBER E. ARNOLD AND OGDEN L. STEELE, OF NEWBRlTAIN, CONNECTICUT.

Letters Patent No. 89,191, dated A11/rtl 20, 1869.

IMPROVEMENT IN BOLTS FOR DOORS, Sec.

The Schedule referred to in these Letters Patent and making part of theInma Be it knownthat we, WILBER F. ARNOLD andOe- DEN L. STEELE, both ofNew Britain, in the county of Hartford, and State of Connecticut, haveinvented a new and useful Improvement in Bolts for Doors, Sto.; and wedo hereby declare -the following to be a full, clear, and exactdescription thereof, which will enable those skilled in the art tomake-and use the same, reference beingl had to the accompanying drawing,forming part of this specification, in which drawing- Fignre 1represents a longitudinal section of this invention.

Figure 2 is a sectional plan, or face view thereof.

Similar letters indicate corresponding parts.

This invention relates to an improvement in that class of boltstechnically known as barrel bolts; and

The improvement consists in the arrangement of a flanged spring-button,in combinationv with aV dumbbell-shaped slot in the barrel of the bolt,in such a manner that when the bolt is moved to either ofthe extremeends of its stroke, the flange of the spring-hutton catches in one oftheenlarged ends of the dumbbell-shaped slot, and thereby the bolt islocked; and by depressing the buttonagainst the action of its spring,the flange thereof is thrown out ofthe enlarged a, through which extendsa stud, b, which is firmlyv riveted, or otherwise fastened to the bolt.

This stud forms the guide for a button, D, and round said stud winds aspiral spring, (l, which has a tendency to force the button out to theposition which the same occupies in g. 1 of the'drawing.

The inner end ofthe button D forms a flange, c, just large enough toenter the enlarged ends of the slot a, but too large to pass through thenarrow part of said slot.

Next to this ange is a neck, e, which is small enough to pass freelythrough the narrow part of the slot a.

When the bolt is brought in either of the extreme ends of its stroke,and the button is permitted to follow the action of its spring d, theflange c drops into one of the enlarged portions of the slot a, and thebolt is locked.

In order to move the bolt, the button must be depressed to such aposition that the neck e comes opposite the narrow portion of the slota, and when the bolt has reached the opposite end of its stroke, thebutton rises, andthe flange c enters the enlarged portion of the slot,and locks the bolt.

By these means a self-locking bolt is obtained, which is handsome in itsappearance, simple and durable in its construction, and operated withoutdiiculty.

Having thus described our invention,

What we claim as new, and desire to secure by Letters Patent, is-

'lhe hollow button D, c, e, tted to-slide on the pin b, and enclosingthe spring d, when arranged as shown, with relation to the bolt A,casing B, and slot a, to be operated as set forth.

WILBER F. ARNOLD. OGDEN L. STEELE. Witnesses:

AUSTIN HART, CHARLES R. HART.

